WASHINGTON, D.C. — Every day, migrants leave their homelands behind for new lives in other countries. Reflecting this desire, rather than the reality of the numbers that actually migrate, Gallup finds about 16% of the world’s adults would like to move to another country permanently if they had the chance. This translates to roughly 700 million worldwide — more than the entire adult population of North and South America combined.

From its surveys in 135 countries … Gallup finds residents of sub-Saharan African countries are most likely to express a desire to move abroad permanently. Thirty-eight percent of the adult population in the region — or an estimated 165 million — say they would like to do this if the opportunity arises. Residents in Asian countries are the least likely to say they would like to move — with 10% of the adult population, or roughly 250 million, expressing a desire to migrate permanently.

The United States is the top desired destination country for the 700 million adults who would like to relocate permanently to another country. Nearly one-quarter (24%) of these respondents, which translates to more than 165 million adults worldwide, name the United States as their desired future residence. With an additional estimated 45 million saying they would like to move to Canada, Northern America is one of the two most desired regions.

…. If all adults who desire to move to another country permanently actually moved to their desired destination country today, some countries would suffer tremendous losses in human capital and others would be overwhelmed.

Here are two thoughtful perspectives on the two questions above — about a country’s capacity to take in millions of newcomers and what happens to countries that lose many of their citizens:

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